Lowland fog

The Lowland Fog, commonly referred to as “Blue Fog” or “The Fog” relates to the highly corrosive gas that surrounds the continents of Terr, named for the dark blue hue that it reflects under certain lighting conditions with the sun and moon. This gas is extremely poisonous to most life, especially mammalian life, and restricts travel between continents, except through rather small raised land or water bridges. This has caused all continents to become very isolated and develop very unique cultures.

Lowland Fog is extremely corrosive, and can deteriorate a major iron cannon down to literal dust in just 2 weeks. An animal will die within days if they breathe the fog for an extended period, and will become extremely ill if they catch even a few breaths.

Lowland Fog reacts positively to water. When it rains, the Fog is weighed down further into the lowlands, allowing humans to safely venture out into the midlands and explore. The Salt sea that separates Braesi and Eyrsa keeps the majority of the Brume from raising to the highlands around them. Ocean adjacent cities are very popular is most of Terr, though less so in Eyrsa.